During the Second Vatican Council, 510 archbishops and bishops from 78 countries signed a request to the pope to consecrate the whole world, especially and explicitly Russia and the other nations dominated by communism, to the Immaculate Heart. Pope Paul VI, at the end of the third session of the Second Vatican Council on Nov. 21, 1964, entrusted the human race to the Immaculate Heart of Mary.
In his speech at the end of the third session of the council, he said: “To your Immaculate Heart, O Virgin Mother of God, we recommend the whole human race; lead him to recognize Christ Jesus, the only and true Savior; preserve him from the misfortunes that sins attract and give him peace, which is founded on truth, justice, freedom, and love. “
That act of consecration was also significant in another sense.
Devotion to the Sacred Heart of Mary was subject to debates and openly contested at Vatican II. Some council fathers considered it an ancient, almost superstitious practice.
In his “Diary of the Council,” Father Yves Congar (1904–1995) noted: “I am doing the maximum possible campaign against a consecration of the world to the Immaculate Heart of Mary because I see the danger of a movement in this sense being formed.”